Re-implementing Optionals using Swift’s powerful enum type.

This post updated December 6, 2014 to reflect changes in Xcode 6.2 If you've been messing with Swift much lately, you may have noticed that enum's do much more than they did in Objective-C, or in most other languages for that matter. In the WWDC videos discussing Swift, one of the presenters mentions that Optionals are implemented as enums. Let's…

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